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M577 (MTSQ Fuze)
The M577 is a US-developed, mechanical time and superquick (MTSQ) fuze, which is not fitted with a detonative booster, though it does have a small (0.25 g) high explosive lead output. Superquick impact functioning of the M577A1 is initiated by a point-detonating element (crush switch), which is present in its nose tip area. The M577 is known to be used with spin-stabilised carrier (cargo and cluster) projectiles, which includes 4.2-inch mor...
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